GB/T 37409-2019 Testing specification for photovoltaic grid-connected inverter
1 Scope
This standard specifies the technical requirements for the testing of appearance and structure, environmental adaptability, safety performance, electrical performance, communication, electromagnetic compatibility, efficiency, marking durability, packaging, transportation and storage of photovoltaic grid-connected inverters.
This standard is applicable to the type test of photovoltaic grid-connected inverters, and may serve as a reference for the factory test and the field test thereof.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 3768 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Survey method using an enveloping measurement surface over a reflecting plane
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB 4824 Industrial, scientific and medical (ISM) radio-frequency equipment - Disturbance characteristics - Limits and methods of measurement
GB/T 4857.10 Packaging - Basic tests for transport packages - Part 10: Sinusoidal vibration test method using at variable vibration frequency
GB/T 6461 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests
GB/T 9254 Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement
GB/T 12325 Power quality - Deviation of supply voltage
GB/T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543 Power quality - Three-phase voltage unbalance
GB/T 15945 Power quality - Frequency deviation for power system
GB/T 16404 Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 1: Measurement at discrete points
GB/T 16935.1 Insulation coordination for equipment within low-voltage systems - Part 1: Principles requirements and tests
GB/T 17626.2 Electromagnetic compatibility - Testing and measurement techniques - Electrostaic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility - Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test
GB/T 17626.4 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test
GB/T 17626.6 Electromagnetic compatibility - Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields
GB/T 17626.8 Electromagnetic compatibility - Testing and measurement techniques - Power frequency magnetic field immunity test
GB/T 17627.2 High-voltage test techniques for low-voltage equipment - Part 2: Measuring system and test equipment
GB 20840.2 Instrument transformers - Part 2: Additional requirements for current transformers
GB 20840.3 Instrument transformers - Part 3: Additional requirements for inductive voltage transformers
GB/T 37408 Technical requirements for photovoltaic grid-connected inverter
NB/T 32008 Testing code for power quality of inverters used in photovoltaic power station
NB/T 32010 The anti-islanding testing code for inverter of utility-interconnected photovoltaic power station
NB/T 32032 Technical code for inverter efficiency testing of photovoltaic power station
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
primary power-frequency regulating coefficient
Kf
ratio representing the variation in inverter active power to that in system frequency in case of frequency deviation in the system, calculated using Equation (1)
(1)
where,
ΔP——the variation in the output active power of the inverter, kW;
PN——the rated active power of the inverter, kW;
Foreword ii
1 Scope
2 Normative references
3 Terms and definitions
4 Basic requirements
5 Appearance and structure inspection
6 Environmental adaptability test
7 Safety performance test
8 Electrical performance test
9 Communication test
10 EMC test
11 Efficiency test
12 Marking durability test
13 Packaging, transportation and storage
Annex A (Normative) Contact probe
Annex B (Normative) Touch current tester
Annex C (Normative) Response time and error of power control
Annex D (normative) Methods for judgment and calculation of reactive current injection
